Chlamydia (CT)

Doxycycline 100 mg orally 2 times/day for 7 days 

Azithromycin 1 g orally in a single dose 

OR 

Levofloxacin 500 mg orally once daily for 7 days 

Azithromycin 1 g orally in a single dose 

Amoxicillin 500 mg orally 3 times/day for 7 days 

Persons who have chlamydia and HIV infection should receive the same treatment regimen as those who do not have HIV.

None

For infants and children weighing <45 kg: Erythromycin base or ethyl succinate 50 mg/kg body weight/day orally divided into 4 doses daily for 14 days. 

Data are limited regarding the effectiveness and optimal dose of azithromycin for treating chlamydial infection among infants and children weighing <45 kg. 

For children weighing ≥45 kg but aged <8: Azithromycin 1 g orally in a single dose 

For children aged ≥8 years: Azithromycin 1 g orally in a single dose 

OR 

Doxycycline 100 mg orally 2 times/day for 7 days 

None

Erythromycin base or ethyl succinate 50 mg/kg body weight/day orally, divided into 4 doses daily for 14 days* 

*An association between oral erythromycin and azithromycin and infantile hypertrophic pyloric stenosis (IHPS) has been reported among infants aged <6 weeks. Infants treated with either of these antimicrobials should be followed for IHPS signs and symptoms 

None

Erythromycin base or ethyl succinate 50 mg/kg body weight/day orally, divided into 4 doses daily for 14 days 

Azithromycin suspension 20 mg/kg body weight/day orally, 1 dose daily for 3  days